Zadonase Tablets 10's are primarily used to treat allergic symptoms like sneezing, runny nose, congestion, stuffy nose, or watery eyes. When the immune system reacts to a foreign chemical that is generally not damaging to your body, an allergy is a disorder that develops. 'Allergens' are these alien chemicals. Certain foods and seasonal allergens like hay fever, pollen, or pet dander may cause allergies in some people. When mucus or a foreign irritant enters the respiratory system, one of the main signs of allergies is a cough, which occurs as a reflex in the throat.Disclaimer:For more information contact your physician.